Improved apparatus tor drilling- metal



dilated mes @met @twine LA. KIRKPATRICK- AND e; W. HORNBY, orEVANSVILLE, INDIANA.

Letters Patent-No. 93,451, dated August, 10, 1869.

IMPROVED APPARATUS FOR 'DRILLINGL METAL.

The Schedule referred to in these Letters Patent and making part cf thename.V

To all whom tt may concern.:

Be it known that we,J. A.KIRKPATRICK and G. W.HORNBY, of Evansville',inthe county of Vander- `burg, and Stateof Indiana, have invented a newand improved Drilling-Machine; and We do hereby declare that thefollowing is a full, clear, and exact description the feed when anyrequired depth of boring has been accomplished.

Figure 1 represents a side elevation of our improved machine.

Figure 2 represents a plan view of thev same.

Similar letters of reference indicate corresponding parts. Thedrill-spindle A is provided with a feed-screw, B, screwing through thebracket D, and having a ratchetfeed wheel, C, on the top of the bracketD, arranged to rotate thereon, turning the screw to screw it up or down,in the usual way, the ratchet-wheel being operated by a pawl, E.

For operating this pawl E, I connect it to a lever, F, pivoted' at G tothe frame, and projecting downward provided with a series of pins, I,which, strikingfthe end of the lever F when the wheel is being turned,vi-

- brate the said lever, thereby cause the intermittent j rota-tion ofthewheel C to screw the spindle down.

The pawl-lever F is withdrawn by a spiral spring, K.

The feed is varied by adjusting the paw] up or down en the feed-lever.

The apparatus for throwing out the feed consistsof an adjustable block,M, supporting-red N, adjusting spring-plate O, tripping-arm 1), yoke Q,and spring U.

The said adj nstable block is movable up and down on the rod N, risingup from the frame, and carries a yoke, Q, extendingaround'thefeed-screw, taking under the head thereof, so as to be movedup and down on the screw.

The said block also carries the tripping-aun P, which takes under thepawl E, and a stud, T, which takes into the notches of the perforatedadjusting-plate O, to hold the block at any given point up or down onthe rod N, as may beA required, for throwing out the awl. 1 p When thefeed-screw works down, so thatthe head reaches the yoke, and carries itdown, the latter, by turning or tipping the block M, causes the lowerouter corner ,thereof to vstrike the spring-holding plate F and press it.backfso as to disengage the stud T, when thel spring U will throw theblock up, and lift the pawl out of action with the wheel G.

To facilitate the disengagement of .the stud T,it is placed as nearly asmay be 'at the upper side ot the'- block M. The hole through the ,latterfor the' rod N is so shaped as to cause' the block tobind' on the rod.when pressed upward by the spring, one side of the block being held bythe stud T, thereby preventing the block being turned upward, While itpermits the block to be turned downward bythe yoke Q,for disengagement`of the stud T. K engaging the stud T from the pe1'forat1ons 111 thespring-plate, said perforations' may be made mclmed to their axial line,on the upper side; or. in other words,vmade funnel-shaped, with thelarger vmouth toward the stud T. I

We propose Yto provide a die-holding block, V. For

' attachment to the spindle, axnd'a rod-holding vise, \V, in the table,whereby we are enabled to out screwthreads on bolts.

alongside of the back of the driving-wheel H, which is fe also providetwo driving-wheels, givin g'difi'erent speeds, for light or heavy work.

v Having thus described our invention,

What we claim as new, and desire to secure by Letters Patent, is-

1. The combination of the ratchet-feed wheel O,

paw] L, lever F, and operating-pins I,.in the driving-Y wheel, when allarranged as specified.

2. The combination, with the feeding-screw, ratchetwheel, and pawl, oftherod N, block M, yoke Q, tripping-arm l), spring-holding plate O, andspring'U, all

substantially as specified. p

. J. A. KIRKPATRIGK;

G. W. HORNBY. v

Witnesses OsnoRNE REILLY, JOHN 'Wiln'rnnEADg To further aid in' dis-

